NodeJS forwarding client SSL certificates - node.js

I am working on Node.js server application which is SSL enabled and accepts client certificates. I am using following code to create https server.
const options = {
key: fs.readFileSync('key.pem'),
cert: fs.readFileSync('cert.pem'),
ca: fs.readFileSync('ca.pem'),
requestCert: true,
rejectUnauthorized: true
};
https.createServer(options,app).listen(8090, function(){
console.log("Listening on 8090");
});
Other Node.js based client apps are able to connect using their SSL certficate and get the service response.
However from my sever, I want to make another server call and wish to pass on the same client certificate I received. I simply want to forward the same ceritifcate, I understand I can get the certificate details in request object, but how to retrieve the crt and key from that object?
I am looking to do something like below:
app.get('/myservice', (req,res) => {
//req.socket.getPeerCertificate(true);
var agent = new https.Agent({
cert: somelibrary(req.socket.getPeerCertificate(true).??????),
key: somelibrary(req.socket.getPeerCertificate(true).??????),
});
fetch('http://AnotherServiceURL', { method: 'GET' agent}).then(function(response){
res.json(response);
});
});
Is there any library which can convert request certificate details in a way so as to forward those as key and cert? Or is there any other/better way of doing this?

I understand I can get the certificate details in request object, but how to retrieve the crt and key from that object?
While it would be possible to pass the client certificate itself it is impossible to use it again as client certificate in another TLS connection to the final target. For this you would need to have access to the private key of the client, which as the name says is private to the client. As for getting the client certificate (i.e. the public part) see Node.js: access the client certificate.

Related

MTLS - generate certificate to nodejs client side

We need to communicate between our ec2 server and our customer server via Mutual TLS.
The requests are sent from our server to our customer server - so we are the client here.
I read this post, talking about how to generate the files.
The first step is to create a certificate authority (CA) that both the
client and server trust. The CA is just a public and private key with
the public key wrapped up in a self-signed X.509 certificate.
Our cert and their cert - should be signed from the same root CA? who should provide it?
The code in my side should be like:
const req = https.request(
{
hostname: 'myserver.internal.net',
port: 443,
path: '/',
method: 'GET',
cert: fs.readFileSync('client.crt'),
key: fs.readFileSync('client.key'),
ca: fs.readFileSync('ca.crt')
},
res => {
res.on('data', function(data) {
// do something with response
});
}
);
So what should we provide each other? We don't exactly understand and they are not providing more details, just asked us to give them a certificate...
Our cert and their cert - should be signed from the same root CA? who should provide it?
Since the control of the client certificate is done at the TLS server side (i.e. at the customer) it depends fully on what they expect. They might require a publicly signed certificate, they might require a certificate signed by their own CA. Or they might simply check that a specific certificate gets used and will also accept self-signed certificates for this.

validate https requests using a Certificate Authority (CA)

I have deployed multiple microservices containing frontend application and backend service.
The frontend application is accessible via xyz.com domain. It calls the backend service API endpoint.
So, what I really want is to check is that if any request that is coming from the frontend application is valid and from authentic source on the basis of its domain and subdomain using Certificate Authority in Node.js.
After doing a little bit of research about how it can be done in node.js,
I found out that it can be done using nodejs https module's request method. But the problem with this approach is that nodejs maintains a list of CA certs, which easily gets out of date and there is a chance that the CA that has verified my domain certificate is not part of that list. Although they provide a way to pass additional CA's but still it is a dependency on the user side that they have to maintain the list. I am currently a little bit lost on how to do it in a proper way.
I need help on how to do this process easily and efficiently.
There are two ways to validate a domain in node.js
https.request
Nodejs https module's request method validates the domain provided against the chain of Certificate Authorities root certificate. A code example is given below:
var https = require('https');
var options = {
hostname: 'github.com/',
port: 443,
path: '/',
method: 'GET',
rejectUnauthorized: true
};
var ss;
var req = https.request(options, function(res) {
console.log("statusCode: ", res.statusCode);
console.log("headers: ", res.headers);
});
req.end();
req.on('error', function(e) {
console.error(e);
});
rejectUnauthorized: This means that it will validate the server/domain certificate against the chain of CA's root certificate.
The only problem with this approach is that this chain should be updated regularly otherwise a new domain that is signed by a certificate authority root certificate which is not part of the chain, marked as an invalid certificate(a common example is a self-signed certificate).
ssl-validate module
It can also be used but it requires another module to get the domain information.

How to authenticate user with CAC in Node/Express

I need to allow users to log into my react website using their DoD issued Common Access Card. I am using an express api as an authentication server. I've got the server configured to require a client cert:
const options = {
key: fs.readFileSync(config.ssl.keyPath),
cert: fs.readFileSync(config.ssl.certPath),
ca: [fs.readFileSync(config.ssl.caPath)],
requestCert: true,
rejectUnauthorized: false,
};
https.createServer(options, expressApp).listen(port);
How do I get my react app to request/load/read the certificate from the CAC?
You will need to create a .PFX cert and import it into the browser's certificate store. The certificate generated should be signed by the CA used to start your express server. The certificate imported into your browser should also be enabled for "Client Authentication".

node.js: HTTPS client certificate without server validation?

I have a https server and client in node.js.
For 'normal' HTTPS a host lets in any client, and the client authenticates the host.
However in my situation I would like to do the opposite:
I want the host to authenticate the client, but the client to connect to any host without authenticating it. ie: The host does not get a key/crt (but does trust the CA), while the client does gets a key/crt (and also trusts the CA).
The standard way for https with both sides authenticating each other is:
Server options:
key: fs.readFileSync('server-key.pem'),
cert: fs.readFileSync('server-crt.pem'),
ca: fs.readFileSync('ca-crt.pem'),
requestCert: true,
rejectUnauthorized: true
Client options:
key: fs.readFileSync('client-key.pem'),
cert: fs.readFileSync('client-crt.pem'),
ca: fs.readFileSync('ca-crt.pem') };
I removed key and crt from server, but how to tell the client not to request server/host cert? I can't seem to figure that part out? The documentation claims that for a client rejectUnauthorized must be set to true for the client to validate the server, so I set it to false. But the TLS handshake seems to be failing.

Socket.IO TLS requiring key/cert

I have a CA from an authorized server. I have set up my HTTPS and WebSocket setup as follows:
var httpsOptions = {
cert: fs.readFileSync(config.ssl.server_cert),
key: fs.readFileSync(config.ssl.server_key),
requestCert: true,
rejectUnauthorized: true,
passphrase: config.ssl.server_password
};
httpsServer.listen(config.https_port, function () {
console.info("HTTPS server running on %d", config.https_port);
});
io = io.listen(server);
io.sockets.on('connection', function (socket) {
console.log("connected: " + socket.id);
})
Now, my clients will have to sign up for an account. When they do, I want to create a private/public key for them, and sign it with the CA that I have. They then have to use them for any web socket connection. If these are not provided, I don't want to even allow a connection.
My client at the moment is then:
io.connect(url, {secure: true, 'force new connection': true});
But I cannot figure out how to A) pass the key to the server, and B) If this is even possible?
If you're talking about browsers, then the client certificate and private key has to be installed in the browser or OS certificate store (depending on which browser is being used). Once installed, the browser will automatically send the certificate.
Unfortunately, client certificate installation is not a user-friendly process.
If your client is a node process, a client cert option was (finally) added in socket.io 1.3.
Don't forget to validate that the presented certificate matches a user account in your system. rejectUnauthorized only validates that the client presented a certificate issued by any trusted CA.
Do you mean you have a SSL certificate for your server? You can't sign new certificates with that. No trusted root CA gives out certs that allow third parties to sign certs without a very long process and lots of money.
You can run your own CA that signs client certificates. You have to configure your server to trust your client certificate-issuing CA (via the ca option in createServer) since it will be untrusted by default.

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